Back to results
US 2009/0289745 A1Published application
DMS Filter with Improved Matching
AssigneeEpcos AG
InventorsThomas Bauer, Andreas Waldherr, Stefan Freisleben
Life of this patent
Estimating the term…
Abstract
For improving the matching of a DMS track that is connected in series with a reactance element, it is proposed to connect a shunt branch to ground between the DMS track and reactance element parallel to the signal-carrying conductor section, where a capacitive element is arranged in this shunt branch.
Claims30
A filter arrangement comprising:
- a signal path connected between an input and an output, the signal path arranged at least in some sections on a piezoelectric substrate;
- a DMS track:
- a reactance element, the reactance element and the DMS track being electrically connected in series in the signal path;
- a capacitive element that does not act as a reactance element;
- and
- a shunt branch to the signal path connected to a ground potential by means of the capacitive element, the shunt branch being arranged between the DMS track and the reactance element.
3 more elements
Dependencies are inferred from the claim text.